38405239 has 4 divisors (see below), whose sum is σ = 40075056. Its totient is φ = 36735424.

The previous prime is 38405203. The next prime is 38405243. The reversal of 38405239 is 93250483.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93250483 = 1723 ⋅54121.

It is a cyclic number.

It is not a de Polignac number, because 38405239 - 2¹¹ = 38403191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38405639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834874 + ... + 834919.

It is an arithmetic number, because the mean of its divisors is an integer number (10018764).

Almost surely, 2^38405239 is an apocalyptic number.

38405239 is a deficient number, since it is larger than the sum of its proper divisors (1669817).

38405239 is a wasteful number, since it uses less digits than its factorization.

38405239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669816.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 38405239 is about 6197.1960595095. The cubic root of 38405239 is about 337.3884082832.

The spelling of 38405239 in words is "thirty-eight million, four hundred five thousand, two hundred thirty-nine".